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P3009.8.1.1 Percolation Test Hole
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The test hole shall be dug or bored. The test hole shall have vertical sides and a horizontal dimension of 4 inches to 8 inches (102 mm to 203 mm). The bottom and sides of the hole shall be scratched with a sharp-pointed instrument to expose the natural soil. Loose material shall be removed from the hole and the bottom shall be covered with 2 inches (51 mm) of gravel or coarse sand.
Related Code Sections
P3009.8.1.1 Sanitary Drainage, Percolation Test Hole
The test hole shall be dug or bored. The test hole shall have vertical sides and a horizontal dimension of 4 inches to 8 inches (102 mm to 203 mm ...
Residential Code 2021 of Colorado > 30 Sanitary Drainage > P3009 Graywater Soil Absorption Systems > P3009.8 Percolation Tests > P3009.8.1 Percolation Tests and Procedures > P3009.8.1.1 Percolation Test Hole